浙江瑞堂塑料科技股份有限公司（简称瑞堂科技）成立于2013年，注册资本1250万。 公司拥有国内先进的粉末加工技术， 全套的高分子测量仪器， 认证证书齐全（NSF、 UL、 FDA、RoHS等），年产能超过2.1万吨。
   公司致力于滚塑功能高分子粉末的研发、生产和销售，主要产品包括LLDPE（线性低密度聚乙烯）、HDPE（高密度聚乙烯）、XPE（交联聚乙烯）、PP（聚丙烯）、PA（尼龙）、TPO（弹性体）等，还可附加阻燃、抗静电、抗菌、防霉等功能。除常规改性材料外，公司还生产特殊效果材料、PE发泡材料、PE粘接材料等。公司的材料广泛应用于冷链物流、军民两用包装、   清洁设备、水上休闲、海工航道、农机、工程车辆、游乐、畜牧业、管道防腐等领域。

公司位于中国滚塑的发源地之一浙江省宁波慈溪市，东临沈海高速，南临329国道，距离宁波港和宁波栎社国际机场也很近，交通便利，产业配套齐全。

Zhejiang Rotoun Plastic Technology Corp. (Referred to as Rotoun Technology) was established in 2013, registered capital of 12.5 million. The company has domestic advanced powder processing technology, a complete set of polymer measuring instruments, complete certification certificates (NSF, UL, FDA, RoHS, etc.), and an annual production capacity of more than 21,000 tons.

Our company is committed to the R & D, production and sales of rotomolding functional polymer powder in China. The main products include LLDPE (linear low-density polyethylene), HDPE (high-density polyethylene), XPE (cross-linked polyethylene), PP (polypropylene), PA (nylon), TPO (elastomer), etc. also, we can  add flame retardant, antistatic, antibacterial, mildew proof and other functions. In addition to conventional modified materials, our company produce special effect materials, PE foaming materials, PE bonding materials, etc. Our company materials are widely used in cold chain logistics, military and civil packaging, cleaning equipment, water leisure, marine navigation channels, agricultural machinery, engineering vehicles, amusement, animal husbandry, pipeline anti-corrosion and other fields.

Company locates Cixi City, Ningbo, Zhejiang Province, which is one of the cradles for China Rotational Molding. Cixi City has comprehensive supporting industries and very convenient transportation, Shenhai Expressway (G15) lies on east, and G329 National Highway lies on south, also Cixi City nears by Ningbo Port and Ningbo Lishe International Airport.